Typewriting machine



oa. ze 192e. 1,604,795

J. WALDHEIM TYPEWRITING MACHINE Filed Dec'. 2o. 1924 2 sheets-sheet 1WMM Oct. 26 192e.

J. WALDHEIM TYPEWRITING MACHINE Filed nec. 2o, 1924 2 Sheets-Sheet 2Patented Cet. 26, 1926.

UNITED STATES y 1,604,795 APATENT ortica.

JOIIN.WALDHE1M, OF ELIZABETH, NEW JERSEY, ASSIGNOR 'IO UNDER/WOOD TYPE-VVRITER COMPANY, OF NEW YORK, N.. Y., A CORPORATION OF DELAWARE.

TYPEWRITING MACHINE.

Application led December 20, 1924. Serial No. 757,130.

This invention relates to sound-deadening `cabinets for typewritingmachines, and one of its features is the provision of means whereby acompletely enclosed typewriter carriage may be manipulated by theinsertion of the hand through a self-closing opening. Y

Sound-proof cabinets have been provided for typewriting machines inwhich special carriage-control levers extend to the outside of thecasing through slot-sealing cushions, and also sound-proof cabinets inwhich an opening adjacent the path of said levers and in front thereofis provided in order that the hand may reach thecarriagecontrollinglevers.

An object of the present invention is to provide a sound-deadeningcasingwhich, while simply designed for economical manufacture, is at the sametime highly efficient p in its noiseseliminating qualities.

One of its features is that the typewriter may be installed within thecasing with little or no alteration thereof.

Another feature is that the typewriter is completely enclosed within thecasing eX- cept for the keyboard-extension which pro-` trudes through anopening in the casing.

The casing consists in one form of a lower member and a hood orcoverpivotally mounted on said lower member. The keyboard of themachine'extends to the exteriorA of the casing in order to render thetypekeys operable, and the typewriter is otherwise completely enclosed.Adjacent the carriage-control levers there is provided an opening formedbetween the cover and the casing which extends substantially the fullwidth of the casing. Said opening is provided with a self-closingmechanism, which may consist of a double door and linkage arrangement,manually operable by means of .finger-pieces at the ends, so that thedoors may be swung open to reach the carriagecontrolling levers. Thetyping in the typewriter and the levers on the carriage may be seenthrough a transparent window at the top of the cover and in the path ofthe line of visionof the operative.

There is shown in the drawings a modilil cation of the .closure in whichdifferent means for synchronizing the movement of which the" doorsswing, and one of the sec tors is provided with a finger-piece foroperating the same.

Another modification of the Aclosure consists of two flaps or flexiblematerial having one-of the edges fastened to the edges of the openingand abutting against each other to effectively close the opening. In onecase the flaps are made of Celluloid covered with some sound-deadeningmaterial, while in 55 the other case the iiaps are made of a layer offelt having arubber backing. The finger is thrust through the opening toreach the levers, thereby separating the iaps, and the linger may beslid along the opening.

Another modification is illustrated, in which the openingis providedwith a closure consisting of a single door rockably mounted at one edgeand operable by means of pressui'e exerted thereon against a clos- 75ing spring or by means ofltinger-pieces fast on the rock-shaft uponwhich the door is mounted.

Other features and advantages will hereinafter appear.

In the accompanying drawings,

Figure l .is a front view in elevation, showingthe invention in itspreferred form.

Figure 2 is a cross-sectional view in elevation through the line2-2 ofFigure 1,'85 showing the closure in its effective position.`

Figure 3 is a cross-sectionalview in elevation, showing the closure inVits ineffective position and a linger manipulating the linespace leverof the typewriter.

Figure a is amoditied form shown in crosssection, and illustrating othermeans for operating the closure.

Figure 5 is a front view in elevation, showing the mechanism illustratedin Figure 4.

Figure 6 illustrates another manner of closing the opening through whichlthe carriage-control levers are operated.

Figures 7 and 8 `are respectively a front 100 view and a cross-sectionalview of a closure comprising a single door and means for operating thesame.

Figure 9 is amoditied form of the closure shown in Figure 6, and showsthe cover in its open position in dot-and-dash lines.

This invention is illustrated as applied to an Underwood standardtypewriting ma chine. Said machine comprises a frame 10 and a carriagel1 disposed for letter-feed 110 travel. Upon said carriage there aremounted the shiftable platen-frames in which a platen 12 is iournaled.For controlling the movements otl the carriage and to line-space awork-sheet around the platen, there are provided a line-space lever 13and a carriage-release lever 14.

Typewriting machines of this general character are `comparat-ively noisyin their operation. It is in order to confine the noise thatthe.sound-deadening casing which forms the subjectof this invention hasbeen provided.

rlhe casing is shown in its preferred form in Figures 1, 2 and 3,- andcomprises a lower member 15 anda hood or cover 16 pivotally mounted on al1inge17 fast to the lower member. Said lower member is provided with anopening 18 at lthe front through which the keyboard-extension of themachine protrudes to .render the same operable. The borders around saidopening are e'tl'ectively sealed against the emission of sound, and boththe lower member and the cover are lined with layers of sounddeadeningmaterial to further refract the sound waves and confine them Vwithin'the casing. Said layers of sound-cleaclening material may be substitutedby a double metal wall, or the casing and cover may be built with asingle wall, as shown in the drawings, depending on the degree of noiseeliminating 'efficiency which may be required.

In order that the line-space lever 13 may be manipulated withoutdisplacing the cover, there is provided an opening 19 between the Ycover and the casing adjacent the path of said lever 13 and in frontthereof, so that a finger 20 may reach the lever 13 to return thecarriage 11 and to line-space a worksheet around the platen 12. Saidopening 19 is provided with a closure for further preventing theemission of sound while the machine is operated. The closure consists,in its preferred form, of a `double door arrangcment and linkagedesigned to simultaneously operate both doors when a fingerpiece 21 isrotated.

In order that the lever 13 may be reached with the finger 20 to returnthc carriage, there is provided mechanism whereby the oiiening 19,normally closed to prevent the emission of sound, may be opened. ATothisV end the double door arrangement, which is shown in its effectiveposition in Figure 2, comprises metal mounted on hinge-shafts 25 and 26.Said metal plates are swung open by means of the linger-pieces 21 fastto the shaft 26 against the tension of springs 24 vwound around thepivot shafts. The open position of the doors is shown in Figure 3. Thereis provided linkage operatively connecting the two .floors forsynchronizing their -movement so that both doors will operatesimultaneously.

plates 22 and 23 rockablyl arms are fulcrumed at and connected togetherby means of a pin-and-slot arrangelment 31, the rearward travel of thearms being limited by pins 33 fast to the cover 16. The bearing inVwhich the hinge-shaft 2G rocks is formed by plates 34 fast to the lowermember 15 by means of screws 35. Similarly numbered plates serve asbearings for the shaft 25 and are fastened to the cover 16 by means ofsimilarly numbered screws 35. The doors for closing the opening 19consist of the sheet-metal plates 22 and 23, the inner side of which islined with felt 37 to render the same sound-proof. Around the borders ofsaid plates there are provided felt strips 36 to more effectivelyprevent the leakage of sound waves, said strips being fastened intorecesses in the cover in the lower member.

In some cases it may be desired to open the doors by pushing the doorsin with the linger, while in other cases it may be desired to use thefinger-pieces 21, of which there one at each end of the shaft 26, sothat either hand may be used to operate the finger-pieces. This isadvantageous due to the disposition ofthe carriage in the Underwoodmachine, in which the line-space lever 13 is usually operated with theleft hand while the carriage-release lever 14 is generally manipulatedwith the right hand. 1t will be noted that when the cover is opened toinsert a fresh sheet around the platen, the upper door 22, which isrockably mounted on the cover, and the linkage therefor, will beseparated from its co-operating door 23 and its linkage which is mountedon the casing. To render separable the two sets of links, thearrangement 31 has the slot opened to allow the pin to slide out, asshown in dot-and-dash lines in Figure 2.

Figures-5 and 4 illustrate, respectively, the front view and thecross-sectional view in elevation of a 'modification of the mechanismfor synchronizing the movement of the two doors, and the linkage'provided in the preferred form is substituted by two geared sectors 38pivotally mounted on shafts 39.

which carry the doors 40 fast thereon. Said shafts are rockably mountedon bearings 41 respectively fastened to the cover 42 and to the casing43 by means of screws 44. The

sectors 38 are fastened to the shafts 39 byV means of a hub-and-pinarrangement 45, and the upper sector is provided with a bent tab 46forming a linger-.piece through which the doors are opened. The doorsare covered with sound-deadening material 48, and are returned to theireffective or closed positions by means of springs 47 when the pressureon the tab'46 is released. It will be noted that in this modificationone dooris hung on the cover while the other is mounted on the casing,and that the opening through which the finger-pieces may be reached isformed between the cover and the easing, so that when the cover `isswung backwardly the upper door and its corresponding sector' 3S moveswith the cover. Y Other variations of means for closing the openingthrough which the finger may reach the earriagefcontrol levers are shownin Figures 6, 7, 8 and 9. Figures 6, 7 and 8 illustrate a variation inwhich the opening is in the cover, while Figure 9 shows a constructionin which the joint between the cover and the casing forms the opening.

Referring more particularly to Figure 6, a casing 49 is shown, uponwhich a cover 5() is rockably mounted on a hinge 51. In said cover 50there is provided an opening 52 eX- tending,substantially the full widthof the cover and in front of the levers 13 and 14E. Said opening isprovided with a closure c0nsisting of Celluloid strips 53 having theinner sides covered with sound-deadeninginaterial 54. The celluloidstrips are fastened to the cover by means of screws 55 through metal`strips 56.` Normally the two Celluloid strips are abutting against eachother, as

shown in -full lines in said AFig-ure 6, the

abutment being formed by bent edges 57 along the full length of thestrips. l/Vhen it is desired to reach the lever 13, a finger 58 may bethrust through the opening by foreing open the Celluloid strips, asshown in dot-and-dash lines in Figure 6. The carriage is then returnedto its starting position by sliding thenger along the opening and at fthe end the finger is withdrawn, thereby allowing the spring of theCelluloid strips to act and to effectively close the opening. The cover50 is shown partially opened in dot-and-dash lines to illustrate thatthe opening and the closing means therefor form an integral part of saidcover.

In Figures 7 and S another manner of closing an opening 59 in a cover 60is shown. The cover is rockably mounted on a hinge 61 fast to a casing62, and is shown in its open or displaced position in d0t-anddash lines.In this form of the invention only one door is provided and it comprisesa. sheet-metal strip 63 fast'to a pivot shaft 64 manually operable bymeans of finger-pieces 65 which extend to the exterior of the cover. Theshaft 64 is hinged in plates 66 which are fast to the cover by means ofscrews 67, and the same plates 66 are also used to secure a strip offelt 68 around the borders to effectively seal the joint between thecover 60` and the edges ofzsaid metal strip 63. The latter is coveredwith a felt lining 69. The door may be swungopen to a position shown indot-and-dash lines inV Figure 8 in Vtwo different manners, by pushing afinger of sound-deadening front strips 71 backed byrubber strips 72, thetwo strips being stuck together and fastened, respectively, to the coverand to the'casing by means of a metal strip 73 and screws 74. Thisclosure permits a local yield `when the finger.` is thrust through theopening to reach the car-I riage-control levers. Thestrips 7l. arecomposed preferably of plush, to f present ya smooth surface to thefingers ,as they slide lengthwise of the slot'. Y

Closure-plates V8O are provided to close the openings betweenv theslot-closing devices 53 (Figure 6) and 71 (Figure 9) at their ends toprevent escape rof sound from said openings. In `Figure 9eachclosureplate 8O is split at S1, so that the upper part may swingback with the cover, the other part being secured to the body-part ofthe casing.

Frointlie foregoing it will be understood that there is provided a;sound-deadening casingwhich completely encloses the typewriting machine,including the finger-pieces on the carriage, such as the line-spacehandle 13, the carriage-return handler and the carriage-release handle(not shown). Said casing has a slot at the front through which thelingers of the operative may reach to said enclosed finger-pieces on thetypewriter carriage. The slot is normally'closed by suitableslot-sealing devices to prevent the escape of sound from the casingthrough said slot. The slotsealing devices are arranged to be pushedaside conveniently by the finger of the `typist as it moves toward thefinger-piece on the carriage. It will further bey understood that thereis provided a window in the cabinet which not 'only renders the typingvisible, but also enables the operative to observe the positionof thecarriage and especially the f finger-pieces thereon with reference tothe :slotin the cabinet, so that the finger maybe inserted in theproperV position lengthwise of the slot according to the position of thedesired fin ger-piece on the carriage.l y

In Figures 1 to 5 and in Figure 9 the slot in the cabinet is formedbetween the cover and the front wallof the body-part of the casing, andconsequentlythere are provided two slot-sealing devices which co-operateslot-sealing devices being supported on the body-part of thepcabinet,and the other be ing carried by the cover of the cabinet, Vso

p with each other to close said slot, one of said that it may be carriedwith the cover when the latter is opened to give access to the platen.

In Figures l to 5, inclusive, andrFigures 7 and S, the slot-sealingelements are pivoted and are composed of metal. These devices maybepushed inwardly by the linger of the typist as it ,reaches to thelinger-piece on the carriage, 'or the devices may be operated byindividual linger-pieces by one hand while the other hand reaches upthrough the slot to the finger-piece on the carriage.

In Figures 7 and 8 the finger-slot is provided in the cover. In thisJform ot the invention only a single slot-sealing element is used whichvis carried by the cover. In Figure 6 the slot is also provided in thecover, but two oppositely-disposed slot-sealing devices are used.

In Figures 2 and 4 there are provided two slot-sealing devices, one onthe cover and the other on the body-part of the cabinet, said devicesbeing connected to each other, so that they `may be operatedsimultaneously. and also to enable the connect-ion to be broken when thecover is swung backV to give .access to the platen.

It will also be noted that in Figure 9 one of the slot-sealing devicesis carried by the cover, while `the other one is carried by thebody-:part of the cabinet.

In order to render visible the work-sheet around :the platen when thetypewriter `is operated inthe easing, there is provided an opening inthe cover which is scaled againstthe emission ot' sound by means of aplate of transparent material. Said plat-e is indicated throughout theseveral views and modiiications by the numeral 75.

Variations may be resorted to within the scope of the invention, andportions of the improvements may be used without others.

Having ythus described my invention, I claim:`

'1. The combination with a typewriting machine including a keyboard, acarriage and control levers on said carriage, of a so-und-deadeningcasing including a. lower member having a. keyboard opening and aliftable hood mounted on said lower member., said casing otherwiseenclosing the machine and including said carriage levers, said, casinghaving a linger-slot, said carriage levers being `accessible to the handof the operator thrust through said slot for manipulation, withoutAlifting the hood of said casing; said finger-slot extending along thecasing to accommodate thecarriagedriving movements of the hand.

2. The combination with a typewriting machine including a keyboard, acarriageA and control levers on said carriage, of a sound-deadeningcasing including a lower member having a keyboard opening and a hoodmounted on said lower member, said casing otherwise enclosing the entirema-- chine and including said carriage levers, said casing having afinger-slot, said carriage levers being accessible tothe hand ot theoperator thrust through said slot, said slot extending along the casingto accommodat-e the carriage-driving movements of the hand, and anopenable but normally closed slot-sealing device A.tor preventing theemission ot sound through said slot.

The combination with a typewriting machine including a keyboard, a.carriage and carriage-control finger-pieces. oit a sound-dcadeningcasing open for the keyboard, said casing otherwise enclosing themachine and having a normally closed slot at the front thereof throughwhich the hand of the opera-tor may be thrust to manipulate vsaidlinger-pieces.

4. The combination with a typewriting machine including a keyboard, acarriage and ycarriage-control finger-pieces, of a sound-deadeningeasing including a lower member having an opening at the front through`which the keyboard protrudes and aliftable hood mounted on said lowermember, said casing otherwise enclosing the machine and having anormally closed slot at the i'ront thereof through which the hand ot theoperator maybe thrust to manipulate said finger-pieces, said slot beingpartly in the front wall ot the casing and partly in the front wall ofthe hood. and openable but, normally closed slot-sealing devices forpreventing the emission of sound through said slot.

5. The combination with a Ytypewriting machine including akeyboard-extension, a carriage and controlling levers therefor, of asound-deadening casing open for the keyboard-extension, said casinghaving a tinger-slot Vthrough which the controlling levers may bereached, and means for preventing the emission of sound through, saidlinger-slot, said means including a doubledoor arrangement, linkage tosynchronize the movement of the' two doors, lingerpieces voropening saiddoors and springs for normally holding said doors in their closedpositions.

6. The combination with a typewriting machine including akeyboard-extension, a carriage and vcontrolling `levers therefor, ot asound-deadening casing and a cover therefor, the casing being open forthe keyboardextension, said casing having a finger-slot extending alongthe casing for operating the controlling levers, and means forpreventing 4the emissio-n oi: sound through said finger-slot, said meansincluding two pivotally-niounted metal doors, springs to keep the doorsnormally closed, linkage partly Jfastened to the cover and partly to thecasing to synchronize. the movement `of the two doors, p a lining ofsound-deadening f material fast' to the inner side of said doors andlinger-piccesfor opening said doors.

7. The combination with a typewriting machine `includingl akeyboard-extension, a carriage and controlling levers therefor, of

- a sound-deadening casing open for the keyboard-extension, said casinghaving a finger-slot in front thereof through which the controllinglevers may be reached to manipulate the carriage, and means'forpreventing the emission of sound through said slot, said means includingtwo pivotally-mounted metal doors, a felt lining fast to the inner sideof said doors, springs to hold the a bell-mouth or funnel entrance forvthen-` ger tof reach andoperate said controlling levers. Y f 3*' 9 Thecombination with a typewritng machine including a keyboard-extension, acarriageand controlling levers therefor, of a-sound-deadening casingopen for thekey` board-extension, saidcasing having lay iinger-slotvfor. Voperating `.said controlling levers, fandfmeans for preventingthe emission of sound through said finger-slot, said means `including apivotally-mounted door havinga felt lining anda felt 'strip around theborders of said iinger-slot, a spring to normally hold the doorfclosedAand a finger! pieceto open said door of. said spring.

. 1,0,.r'lhe` combination with a-ftypewriting machine including akeyboard-extension, a

carriage 'and controlling leverstherefor, of

a sound-deadening casing open for thekey-i board-extension, and havingay linger-slot inV front'of the controlling levers `andadjacent thereto,and means for preventing the emission of` sound through said slot, saidmeans comprising two flap-closmesl abutting against-.eachotherfandzhaving the outeredges fast to the borders of thezslot, saidclosures consisting of a felt outer'layer and rubber lnnerlayerproviding a local yield as the linger is slidalong the slot to operatethe carriage-controlling.levers. Y

lL-The combination withva typewriting machine includingV 'a 1 keyboard,-v a carriage and control levers on said carriage, of a against thepressure.

sound-deadening casing including a lower member having a keyboardopening and a hood mounted on said lower member, said casing otherwise'enclosing the entire machine and including said carriage levers, saidcasing having a linger-slot, said `carriage levers being accessible tothe hand of` the operator thrust through said slot, said slot extendingalong the casing to accommodate the carriage-driving movements of thehand, Vand an openable but normally closed slot-sealing device forpreventing the emission of sound through said slot, said sealing devicebeing mounted to be pushed aside by the movement `of the hand rearwardlythrough said slot to reach said carriage levers. y

l2. The combination `with a typefwriting machine vincluding-a carriageand carriagecontrol levers therefor,fo f a sound-deadening casing havinga linger-slot at the front therein through whichthe lingers may reach tothe enclosed'carriage-control levers on the carriage and slot-sealingdevices to prevent the emission of sound thereof, said slot-sealingdevices being arranged vto be 'opened as the lingers of the hand arethrust through the linger-slot toward the carriageycontrol levers. 1

Thecombination with a-typewriting machine-including a carriage andllingerpieces for controlling said carrage,orl a sound-deadening casingAincludingA a lower member and a liftable hood mounted on said lowermember, said hood having a fin-` ger-slot at the front therein throughwhich the i'ingersof the hand may reach torthe enclosed finger-pieces onthe carriage,and sealing elements for said slot.V 1 i la.V Thecombination with a typewriting machineincluding a carriage `andcontrolling levers therefor, of a sound-deadening `asing` including alower memberand a` cover therefor, said casing having a lingerslotformedbetween said lower member and said cover, and slot-sealing Vdevicescarried partly bythe cover and partly the lower member. f f

` l5. The combination with typewriting machine, including a carriage andvcontrolling leverstherefor, of a sound-deadening casing having alinger-slot at-the front throughwhich thengers of theoperative may bethrust to operate said carriage, and slot-sealing devicesoppositelydisposedand of flexible material to yield when the lingers arethrust through the slot to operate the levers on the carriage. 1G. Thecombination with a typewriting machine including a carriage andcontrolling levers therefor,` of a sound-deadening casing having afinger-slot at the front through which the lingers of the operative maybe thrust tomanipulate the 'rcarri'age, and slot-sealing devicesoppositely disposed and of flexible material to yield when the fingersare thrust through the slot, said slotsealing devices being` made' ofCelluloid or the likev to present a smooth surface to the fingers duringthe movement of the carriage.

17. The combination with a typewriting machine including a carriage andcontrolling levers therefor, of a sound-deadening casing having afinger-slot lat the front through which the fingers may be thrust, andslot-sealing devices oppositely disposed und of flexible material' toyield when the fingers are `thrust 'through the slot to operate thelevers on the carriage, said slot-sealing devices being composed ofCelluloid strips having felt strips fastened thereto to refiex the soundwaves and to prevent their exit through the slot.

l18. The Combination with a typewriting machine Aincluding a carriageand controlling levers therefor, of a sound deadening casing having alower member, a cover therefor, and a finger-slot in saidcover, andslotsealing devices oppositely disposed to yield when a finger is thrustthrough the slot to operate said controlling levers.

19.7The combination `with a typewriting machine including a carriage andcontrolling levers therefor, of a. sound-deadening casinghaving a coverand a finger-slot in said cover, and slot-sealingdevices composed offelt-covered rubber strips stuck together and oppositely disposed toyield when a finger is thrust through the slotv to operate Vsaidcontrollinglevers.

20. The combination with a typewriting machine including a carriage andfingerpieces-therefor, of a sound-deadening casing having a finger-slotadjacent saidV fingerpieces and in front therof, and slot-sealingdevices pivotally mounted and arranged to be pushed inwardly by theVfingers of the same hand which reaches to the finger-pieces of thecarriage.

21. The combination with a typewriting machine including a carriage andfingerpieces therefor, ofa sound-deadening casing having a slot adjacentsaid finger-pieces, slot-sealing devices fast to a pivotally mountedrock-shaft, said devices being arranged to be pushed inwardly by thefingers of the same hand which reaches to the finger-pieces on thecarriage, and fingerpieces fast to the ends of the rock-shaft foropening the slot-sealing devices.

22. The combination with a typewriting machine including a carriage andfinger- Vieces therefor, of asound-deadening casing iaving a slotadjacent said finger-pieces, and slot-sealing devices pivotally mountedY and arranged to be pushed inwardly by the fingers of the same handwhich reaches to the finger-pieces of the carriage, said slotsealingdevices being operatively-connected within the casing so'that one may beoper ated simultaneously with the other.

23. In a sound-proof cabinet for a typewriting machine having a carriageand finger-pieces on said carriage, said cabinet having a slot throughwhich the fingers of the operative may reach to the finger-pieces on thecarriage, means to normally lreep said sloty closed, and a window insaid cabinet througlrwhich the position of the carriage may be observed,so that'the operative may lznow where to thrust the fingers into theslot lengthwise thereof to the finger-pieces on the carriage..

2li. In a sound-proof cabinet for a typewriting machine includingacarriage and finger-piecesY on said carriage, said cabinet having aslot through which the the fingers of the operative may reach to thedesired finger-pieceV on the carriage, means to normally keep said slotclosed, and a fingerpiece to actuate the slot-closing means.

25. In av sound-proof cabinet including a body part and a cover tocompletely enclose a typewriting machine including a carriageandlfinger-pieces on said carriage, said cabinet having a slotr throughvwhich the fingers of the operative may reach to the desired finger-pieceonthe carriage, means to normally keep said slot closed,and a ngerpieceto actuate theslot-closing means.

26. In asound-proof cabinet for a: typewriting machine including acarriage and finger-pieces on said carriage, said cabinet including abody-part and a cover, the-cabinet having a finger-slot formed betweenthe body-part and the cover, slot-closing means including two elements,one Vsup-ported on the coverthevother supported on thevbodypart, andmeans. to actuate saidV elements simultaneously tofopen said slot.`

27. In a sound-proof cabinet for a typewriting machine including acarriage and finger-pieces on said carriage, said cabinet including abody-part and al cover, the cabinet-having a finger-slot formed1 betweenthe body-part and the cover, slot-closing means extending along said`slot, said slot-closing means including-two elements, one supported onthe cover, theI other supported on the body-part, a .finger-piececonnected to one of said elementsto actuate it,` and a connectionbetween saidA elements-to' cause themtoV beV actuated simultaneously bythe lastnamed finger-piece to openrsaidslot so that the fingers of thetypist may reach into saidcabinet to the finger-pieces on the carriage.

28. In a sound-proof cabinet for a. typewriting machine including acarriage and finger-pieces on said carriage, said cabinet including abody-part and a cover,the cabinet havinga slot formed betweeny thebodypart andthe cover, slot-closing means extending along said slot,lsaid'slot-closing means including two elements, one supported on thecover, the other supported. on the body-part, and means including aconnection between said elements to operate them simultaneously to opensaid slot, so that the fingers of the typist may reach into the cabinetto the ingenpieces on the carriage, said connection enabling one of saidelements to be separated from the other while the cover is being opened.

29. In a sound-proof cabinet for a typewriting machine including acarriage and finger-pieces on said carriage, said cabinet having a slotthrough which the fingers of the operative may reach to the desirednger-piece on the carriage, and means to northe operative may reach tothe linger-pieces on the carriage, means t0 normally keep said slotclosed, said cabinet including a cover and a body-part, and having aslot formed between said body-part and said cover, and slot-closingmeans including two elements co-operating with each other and extendingalong said slot1 one of said elements being carried by the cover, theother being carried by the body-part, each element including a strip ofplush and an elastic backing for said plush.

3l. In a sound-proof cabinet for a typewriting machine including acarriage and linger-pieces on said carriage, said cabinet having a slotthrough which the fingers of the operative may reach to thefinger-pieces on the carriage7 two slot-closing strips eX- sectionalrelation7 and closure-plates to c0- operate with the ends of said stripsto prevent the escape of sound from said cabinet.

JOHN WALDHEIM.

'tending along said slot in V-shaped cross-

